Bug Description

As the title says, the download links are missing a xenial in the link directing it to the right path. As an example the broken link for ubuntu xenial amd64 on the QA Tracker is shown above the correct link found at cdimage:

If you intend to help testing Trusty and Xenial before the next point release, see this link for a 'power workaround'; zsync is quite efficient for repeated downloads / upgrades to new daily iso files: